Finding the Fourth Proportional to 12,957, 17,882.82 and 9,807.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957 : 17,882.82 = 9,807.72 : x
2. Step 2: Convert to fraction form
   12,957/17,882.82 = 9,807.72/x
3. Step 3: Cross multiply
   12,957x = 17,882.82 × 9,807.72
4. Step 4: Simplify right side
   12,957x = 175,389,691.37
5. Step 5: Solve for x
   x = 175,389,691.37/12,957
6. Step 6: Final answer
   x = 13,536.29